Article Of Footwear Incorporating A Knitted Component

ABSTRACT

An article of footwear may include an upper incorporating a knitted component. An inlaid strand extends through the knitted component. A combination feeder may be utilized to inlay the strand within the knitted component. As an example, the combination feeder may include a feeder arm that reciprocates between a retracted position and an extended position. In manufacturing the knitted component, the feeder inlays the strand when the feeder arm is in the extended position, and the strand is absent from the knitted component when the feeder arm is in the retracted position.

BACKGROUND

Conventional articles of footwear generally include two primaryelements, an upper and a sole structure. The upper is secured to thesole structure and forms a void on the interior of the footwear forcomfortably and securely receiving a foot. The sole structure is securedto a lower area of the upper, thereby being positioned between the upperand the ground. In athletic footwear, for example, the sole structuremay include a midsole and an outsole. The midsole often includes apolymer foam material that attenuates ground reaction forces to lessenstresses upon the foot and leg during walking, running, and otherambulatory activities. Additionally, the midsole may includefluid-filled chambers, plates, moderators, or other elements thatfurther attenuate forces, enhance stability, or influence the motions ofthe foot. The outsole is secured to a lower surface of the midsole andprovides a ground-engaging portion of the sole structure formed from adurable and wear-resistant material, such as rubber. The sole structuremay also include a sockliner positioned within the void and proximal alower surface of the foot to enhance footwear comfort.

The upper generally extends over the instep and toe areas of the foot,along the medial and lateral sides of the foot, under the foot, andaround the heel area of the foot. In some articles of footwear, such asbasketball footwear and boots, the upper may extend upward and aroundthe ankle to provide support or protection for the ankle. Access to thevoid on the interior of the upper is generally provided by an ankleopening in a heel region of the footwear. A lacing system is oftenincorporated into the upper to adjust the fit of the upper, therebypermitting entry and removal of the foot from the void within the upper.The lacing system also permits the wearer to modify certain dimensionsof the upper, particularly girth, to accommodate feet with varyingdimensions. In addition, the upper may include a tongue that extendsunder the lacing system to enhance adjustability of the footwear, andthe upper may incorporate a heel counter to limit movement of the heel.

A variety of material elements (e.g., textiles, polymer foam, polymersheets, leather, synthetic leather) are conventionally utilized inmanufacturing the upper. In athletic footwear, for example, the uppermay have multiple layers that each include a variety of joined materialelements. As examples, the material elements may be selected to impartstretch-resistance, wear-resistance, flexibility, air-permeability,compressibility, comfort, and moisture-wicking to different areas of theupper. In order to impart the different properties to different areas ofthe upper, material elements are often cut to desired shapes and thenjoined together, usually with stitching or adhesive bonding. Moreover,the material elements are often joined in a layered configuration toimpart multiple properties to the same areas. As the number and type ofmaterial elements incorporated into the upper increases, the time andexpense associated with transporting, stocking, cutting, and joining thematerial elements may also increase. Waste material from cutting andstitching processes also accumulates to a greater degree as the numberand type of material elements incorporated into the upper increases.Moreover, uppers with a greater number of material elements may be moredifficult to recycle than uppers formed from fewer types and numbers ofmaterial elements. By decreasing the number of material elementsutilized in the upper, therefore, waste may be decreased whileincreasing the manufacturing efficiency and recyclability of the upper.

SUMMARY

An article of footwear is disclosed below as having an upper and a solestructure secured to the upper. A knitted component of the upperincludes a fusible yarn and a non-fusible yarn that are knitted togetherto form a plurality of intermeshed loops defining courses and wales. Theknitted component also includes an inlaid strand extending along atleast one of the courses.

The discussion below also discloses an article of footwear having anupper that includes a knit element, an inlaid strand, and a lace. Theknit element defines a portion of an exterior surface of the upper andan opposite interior surface of the upper, with the interior surfacedefining a void for receiving a foot. The knit element extends from athroat area of the upper to a lower area of the upper, and the knitelement defines a plurality of apertures located within the throat area.The inlaid strand extends through the knit element from the throat areato the lower area. The inlaid strand also extends at least partiallyaround the apertures in the throat area, and the inlaid strand islocated between the exterior surface and the interior surface in thethroat area. The lace extends through the apertures.

Additionally, an article of footwear is disclosed below as having anupper that includes a first knitted layer, a second knitted layer, and aplurality of floating yarns. The first knitted layer forms at least aportion of an exterior surface of the upper. The second knitted layer isformed of unitary knit construction with the first knitted layer, andthe second knitted layer is positioned adjacent to the first knittedlayer and at least partially coextensive with the first knitted layer todefine a tube between the first knitted layer and the second knittedlayer. The floating yarns are located within the tube and extend in adirection that is substantially parallel to the first knitted layer andthe second knitted layer. Moreover, the first knitted layer and thesecond knitted layer are at least partially formed from a yarn thatstretches at least one hundred percent.

The advantages and features of novelty characterizing aspects of theinvention are pointed out with particularity in the appended claims. Togain an improved understanding of the advantages and features ofnovelty, however, reference may be made to the following descriptivematter and accompanying figures that describe and illustrate variousconfigurations and concepts related to the invention.

FIGURE DESCRIPTIONS

The foregoing Summary and the following Detailed Description will bebetter understood when read in conjunction with the accompanyingfigures.

FIG. 1 is a perspective view of an article of footwear.

FIG. 2 is a lateral side elevational view of the article of footwear.

FIG. 3 is a medial side elevational view of the article of footwear.

FIGS. 4A-4C are cross-sectional views of the article of footwear, asdefined by section lines 4A-4C in FIGS. 2 and 3.

FIG. 5 is a top plan view of a first knitted component that forms aportion of an upper of the article of footwear.

FIG. 6 is a bottom plan view of the first knitted component.

FIGS. 7A-7E are cross-sectional views of the first knitted component, asdefined by section lines 7A-7E in FIG. 5.

FIGS. 8A and 8B are plan views showing knit structures of the firstknitted component.

FIG. 9 is a top plan view of a second knitted component that may form aportion of the upper of the article of footwear.

FIG. 10 is a bottom plan view of the second knitted component.

FIG. 11 is a schematic top plan view of the second knitted componentshowing knit zones.

FIGS. 12A-12E are cross-sectional views of the second knitted component,as defined by section lines 12A-12E in FIG. 9.

FIGS. 13A-13H are loop diagrams of the knit zones.

FIGS. 14A-14C are top plan views corresponding with FIG. 5 and depictingfurther configurations of the first knitted component.

FIG. 15 is a perspective view of a knitting machine.

FIGS. 16-18 are elevational views of a combination feeder from theknitting machine.

FIG. 19 is an elevational view corresponding with FIG. 16 and showinginternal components of the combination feeder.

FIGS. 20A-20C are elevational views corresponding with FIG. 19 andshowing the operation of the combination feeder.

FIGS. 21A-21I are schematic perspective views of a knitting processutilizing the combination feeder and a conventional feeder.

FIGS. 22A-22C are schematic cross-sectional views of the knittingprocess showing positions of the combination feeder and the conventionalfeeder.

FIG. 23 is a schematic perspective view showing another aspect of theknitting process.

FIG. 24 is a perspective view of another configuration of the knittingmachine.

DETAILED DESCRIPTION

The following discussion and accompanying figures disclose a variety ofconcepts relating to knitted components and the manufacture of knittedcomponents. Although the knitted components may be utilized in a varietyof products, an article of footwear that incorporates one of the knittedcomponents is disclosed below as an example. In addition to footwear,the knitted components may be utilized in other types of apparel (e.g.,shirts, pants, socks, jackets, undergarments), athletic equipment (e.g.,golf bags, baseball and football gloves, soccer ball restrictionstructures), containers (e.g., backpacks, bags), and upholstery forfurniture (e.g., chairs, couches, car seats). The knitted components mayalso be utilized in bed coverings (e.g., sheets, blankets), tablecoverings, towels, flags, tents, sails, and parachutes. The knittedcomponents may be utilized as technical textiles for industrialpurposes, including structures for automotive and aerospaceapplications, filter materials, medical textiles (e.g. bandages, swabs,implants), geotextiles for reinforcing embankments, agrotextiles forcrop protection, and industrial apparel that protects or insulatesagainst heat and radiation. Accordingly, the knitted components andother concepts disclosed herein may be incorporated into a variety ofproducts for both personal and industrial purposes.

Footwear Configuration

An article of footwear 100 is depicted in FIGS. 1-4C as including a solestructure 110 and an upper 120. Although footwear 100 is illustrated ashaving a general configuration suitable for running, concepts associatedwith footwear 100 may also be applied to a variety of other athleticfootwear types, including baseball shoes, basketball shoes, cyclingshoes, football shoes, tennis shoes, soccer shoes, training shoes,walking shoes, and hiking boots, for example. The concepts may also beapplied to footwear types that are generally considered to benon-athletic, including dress shoes, loafers, sandals, and work boots.Accordingly, the concepts disclosed with respect to footwear 100 applyto a wide variety of footwear types.

For reference purposes, footwear 100 may be divided into three generalregions: a forefoot region 101, a midfoot region 102, and a heel region103. Forefoot region 101 generally includes portions of footwear 100corresponding with the toes and the joints connecting the metatarsalswith the phalanges. Midfoot region 102 generally includes portions offootwear 100 corresponding with an arch area of the foot. Heel region103 generally corresponds with rear portions of the foot, including thecalcaneus bone. Footwear 100 also includes a lateral side 104 and amedial side 105, which extend through each of regions 101-103 andcorrespond with opposite sides of footwear 100. More particularly,lateral side 104 corresponds with an outside area of the foot (i.e. thesurface that faces away from the other foot), and medial side 105corresponds with an inside area of the foot (i.e., the surface thatfaces toward the other foot). Regions 101-103 and sides 104-105 are notintended to demarcate precise areas of footwear 100. Rather, regions101-103 and sides 104-105 are intended to represent general areas offootwear 100 to aid in the following discussion. In addition to footwear100, regions 101-103 and sides 104-105 may also be applied to solestructure 110, upper 120, and individual elements thereof.

Sole structure 110 is secured to upper 120 and extends between the footand the ground when footwear 100 is worn. The primary elements of solestructure 110 are a midsole 111, an outsole 112, and a sockliner 113.Midsole 111 is secured to a lower surface of upper 120 and may be formedfrom a compressible polymer foam element (e.g., a polyurethane orethylvinylacetate foam) that attenuates ground reaction forces (i.e.,provides cushioning) when compressed between the foot and the groundduring walking, running, or other ambulatory activities. In furtherconfigurations, midsole 111 may incorporate plates, moderators,fluid-filled chambers, lasting elements, or motion control members thatfurther attenuate forces, enhance stability, or influence the motions ofthe foot, or midsole 21 may be primarily formed from a fluid-filledchamber. Outsole 112 is secured to a lower surface of midsole 111 andmay be formed from a wear-resistant rubber material that is textured toimpart traction. Sockliner 113 is located within upper 120 and ispositioned to extend under a lower surface of the foot to enhance thecomfort of footwear 100. Although this configuration for sole structure110 provides an example of a sole structure that may be used inconnection with upper 120, a variety of other conventional ornonconventional configurations for sole structure 110 may also beutilized. Accordingly, the features of sole structure 110 or any solestructure utilized with upper 120 may vary considerably.

Upper 120 defines a void within footwear 100 for receiving and securinga foot relative to sole structure 110. The void is shaped to accommodatethe foot and extends along a lateral side of the foot, along a medialside of the foot, over the foot, around the heel, and under the foot.Access to the void is provided by an ankle opening 121 located in atleast heel region 103. A lace 122 extends through various lace apertures123 in upper 120 and permits the wearer to modify dimensions of upper120 to accommodate proportions of the foot. More particularly, lace 122permits the wearer to tighten upper 120 around the foot, and lace 122permits the wearer to loosen upper 120 to facilitate entry and removalof the foot from the void (i.e., through ankle opening 121). Inaddition, upper 120 includes a tongue 124 that extends under lace 122and lace apertures 123 to enhance the comfort of footwear 100. Infurther configurations, upper 120 may include additional elements, suchas (a) a heel counter in heel region 103 that enhances stability, (b) atoe guard in forefoot region 101 that is formed of a wear-resistantmaterial, and (c) logos, trademarks, and placards with care instructionsand material information.

Many conventional footwear uppers are formed from multiple materialelements (e.g., textiles, polymer foam, polymer sheets, leather,synthetic leather) that are joined through stitching or bonding, forexample. In contrast, a majority of upper 120 is formed from a knittedcomponent 130, which extends through each of regions 101-103, along bothlateral side 104 and medial side 105, over forefoot region 101, andaround heel region 103. In addition, knitted component 130 formsportions of both an exterior surface and an opposite interior surface ofupper 120. As such, knitted component 130 defines at least a portion ofthe void within upper 120. In some configurations, knitted component 130may also extend under the foot. Referring to FIGS. 4A-4C, however, astrobel sock 125 is secured to knitted component 130 and an uppersurface of midsole 111, thereby forming a portion of upper 120 thatextends under sockliner 113.

Knitted Component Configuration

Knitted component 130 is depicted separate from a remainder of footwear100 in FIGS. 5 and 6. Knitted component 130 is formed of unitary knitconstruction. As utilized herein, a knitted component (e.g., knittedcomponent 130) is defined as being formed of “unitary knit construction”when formed as a one-piece element through a knitting process. That is,the knitting process substantially forms the various features andstructures of knitted component 130 without the need for significantadditional manufacturing steps or processes. Although portions ofknitted component 130 may be joined to each other (e.g., edges ofknitted component 130 being joined together) following the knittingprocess, knitted component 130 remains formed of unitary knitconstruction because it is formed as a one-piece knit element. Moreover,knitted component 130 remains formed of unitary knit construction whenother elements (e.g., lace 122, tongue 124, logos, trademarks, placardswith care instructions and material information) are added following theknitting process.

The primary elements of knitted component 130 are a knit element 131 andan inlaid strand 132. Knit element 131 is formed from at least one yarnthat is manipulated (e.g., with a knitting machine) to form a pluralityof intermeshed loops that define a variety of courses and wales. Thatis, knit element 131 has the structure of a knit textile. Inlaid strand132 extends through knit element 131 and passes between the variousloops within knit element 131. Although inlaid strand 132 generallyextends along courses within knit element 131, inlaid strand 132 mayalso extend along wales within knit element 131. Advantages of inlaidstrand 132 include providing support, stability, and structure. Forexample, inlaid strand 132 assists with securing upper 120 around thefoot, limits deformation in areas of upper 120 (e.g., impartsstretch-resistance) and operates in connection with lace 122 to enhancethe fit of footwear 100.

Knit element 131 has a generally U-shaped configuration that is outlinedby a perimeter edge 133, a pair of heel edges 134, and an inner edge135. When incorporated into footwear 100, perimeter edge 133 laysagainst the upper surface of midsole 111 and is joined to strobel sock125. Heel edges 134 are joined to each other and extend vertically inheel region 103. In some configurations of footwear 100, a materialelement may cover a seam between heel edges 134 to reinforce the seamand enhance the aesthetic appeal of footwear 100. Inner edge 135 formsankle opening 121 and extends forward to an area where lace 122, laceapertures 123, and tongue 124 are located. In addition, knit element 131has a first surface 136 and an opposite second surface 137. Firstsurface 136 forms a portion of the exterior surface of upper 120,whereas second surface 137 forms a portion of the interior surface ofupper 120, thereby defining at least a portion of the void within upper120.

Inlaid strand 132, as noted above, extends through knit element 131 andpasses between the various loops within knit element 131. Moreparticularly, inlaid strand 132 is located within the knit structure ofknit element 131, which may have the configuration of a single textilelayer in the area of inlaid strand 132, and between surfaces 136 and137, as depicted in FIGS. 7A-7D. When knitted component 130 isincorporated into footwear 100, therefore, inlaid strand 132 is locatedbetween the exterior surface and the interior surface of upper 120. Insome configurations, portions of inlaid strand 132 may be visible orexposed on one or both of surfaces 136 and 137. For example, inlaidstrand 132 may lay against one of surfaces 136 and 137, or knit element131 may form indentations or apertures through which inlaid strandpasses. An advantage of having inlaid strand 132 located betweensurfaces 136 and 137 is that knit element 131 protects inlaid strand 132from abrasion and snagging.

Referring to FIGS. 5 and 6, inlaid strand 132 repeatedly extends fromperimeter edge 133 toward inner edge 135 and adjacent to a side of onelace aperture 123, at least partially around the lace aperture 123 to anopposite side, and back to perimeter edge 133. When knitted component130 is incorporated into footwear 100, knit element 131 extends from athroat area of upper 120 (i.e., where lace 122, lace apertures 123, andtongue 124 are located) to a lower area of upper 120 (i.e., where knitelement 131 joins with sole structure 110. In this configuration, inlaidstrand 132 also extends from the throat area to the lower area. Moreparticularly, inlaid strand repeatedly passes through knit element 131from the throat area to the lower area.

Although knit element 131 may be formed in a variety of ways, courses ofthe knit structure generally extend in the same direction as inlaidstrands 132. That is, courses may extend in the direction extendingbetween the throat area and the lower area. As such, a majority ofinlaid strand 132 extends along the courses within knit element 131. Inareas adjacent to lace apertures 123, however, inlaid strand 132 mayalso extend along wales within knit element 131. More particularly,sections of inlaid strand 132 that are parallel to inner edge 135 mayextend along the wales.

As discussed above, inlaid strand 132 passes back and forth through knitelement 131. Referring to FIGS. 5 and 6, inlaid strand 132 alsorepeatedly exits knit element 131 at perimeter edge 133 and thenre-enters knit element 131 at another location of perimeter edge 133,thereby forming loops along perimeter edge 133. An advantage to thisconfiguration is that each section of inlaid strand 132 that extendsbetween the throat area and the lower area may be independentlytensioned, loosened, or otherwise adjusted during the manufacturingprocess of footwear 100. That is, prior to securing sole structure 110to upper 120, sections of inlaid strand 132 may be independentlyadjusted to the proper tension.

In comparison with knit element 131, inlaid strand 132 may exhibitgreater stretch-resistance. That is, inlaid strand 132 may stretch lessthan knit element 131. Given that numerous sections of inlaid strand 132extend from the throat area of upper 120 to the lower area of upper 120,inlaid strand 132 imparts stretch-resistance to the portion of upper 120between the throat area and the lower area. Moreover, placing tensionupon lace 122 may impart tension to inlaid strand 132, thereby inducingthe portion of upper 120 between the throat area and the lower area tolay against the foot. As such, inlaid strand 132 operates in connectionwith lace 122 to enhance the fit of footwear 100.

Knit element 131 may incorporate various types of yarn that impartdifferent properties to separate areas of upper 120. That is, one areaof knit element 131 may be formed from a first type of yarn that impartsa first set of properties, and another area of knit element 131 may beformed from a second type of yarn that imparts a second set ofproperties. In this configuration, properties may vary throughout upper120 by selecting specific yarns for different areas of knit element 131.The properties that a particular type of yarn will impart to an area ofknit element 131 partially depend upon the materials that form thevarious filaments and fibers within the yarn. Cotton, for example,provides a soft hand, natural aesthetics, and biodegradability. Elastaneand stretch polyester each provide substantial stretch and recovery,with stretch polyester also providing recyclability. Rayon provides highluster and moisture absorption. Wool also provides high moistureabsorption, in addition to insulating properties and biodegradability.Nylon is a durable and abrasion-resistant material with relatively highstrength. Polyester is a hydrophobic material that also providesrelatively high durability. In addition to materials, other aspects ofthe yarns selected for knit element 131 may affect the properties ofupper 120. For example, a yarn forming knit element 131 may be amonofilament yarn or a multifilament yarn. The yarn may also includeseparate filaments that are each formed of different materials. Inaddition, the yarn may include filaments that are each formed of two ormore different materials, such as a bicomponent yarn with filamentshaving a sheath-core configuration or two halves formed of differentmaterials. Different degrees of twist and crimping, as well as differentdeniers, may also affect the properties of upper 120. Accordingly, boththe materials forming the yarn and other aspects of the yarn may beselected to impart a variety of properties to separate areas of upper120.

As with the yarns forming knit element 131, the configuration of inlaidstrand 132 may also vary significantly. In addition to yarn, inlaidstrand 132 may have the configurations of a filament (e.g., amonofilament), thread, rope, webbing, cable, or chain, for example. Incomparison with the yarns forming knit element 131, the thickness ofinlaid strand 132 may be greater. In some configurations, inlaid strand132 may have a significantly greater thickness than the yarns of knitelement 131. Although the cross-sectional shape of inlaid strand 132 maybe round, triangular, square, rectangular, elliptical, or irregularshapes may also be utilized. Moreover, the materials forming inlaidstrand 132 may include any of the materials for the yarn within knitelement 131, such as cotton, elastane, polyester, rayon, wool, andnylon. As noted above, inlaid strand 132 may exhibit greaterstretch-resistance than knit element 131. As such, suitable materialsfor inlaid strands 132 may include a variety of engineering filamentsthat are utilized for high tensile strength applications, includingglass, aramids (e.g., para-aramid and meta-aramid), ultra-high molecularweight polyethylene, and liquid crystal polymer. As another example, abraided polyester thread may also be utilized as inlaid strand 132.

An example of a suitable configuration for a portion of knittedcomponent 130 is depicted in FIG. 8A. In this configuration, knitelement 131 includes a yarn 138 that forms a plurality of intermeshedloops defining multiple horizontal courses and vertical wales. Inlaidstrand 132 extends along one of the courses and alternates between beinglocated (a) behind loops formed from yarn 138 and (b) in front of loopsformed from yarn 138. In effect, inlaid strand 132 weaves through thestructure formed by knit element 131. Although yarn 138 forms each ofthe courses in this configuration, additional yarns may form one or moreof the courses or may form a portion of one or more of the courses.

Another example of a suitable configuration for a portion of knittedcomponent 130 is depicted in FIG. 8B. In this configuration, knitelement 131 includes yarn 138 and another yarn 139. Yarns 138 and 139are plated and cooperatively form a plurality of intermeshed loopsdefining multiple horizontal courses and vertical wales. That is, yarns138 and 139 run parallel to each other. As with the configuration inFIG. 8A, inlaid strand 132 extends along one of the courses andalternates between being located (a) behind loops formed from yarns 138and 139 and (b) in front of loops formed from yarns 138 and 139. Anadvantage of this configuration is that the properties of each of yarns138 and 139 may be present in this area of knitted component 130. Forexample, yarns 138 and 139 may have different colors, with the color ofyarn 138 being primarily present on a face of the various stitches inknit element 131 and the color of yarn 139 being primarily present on areverse of the various stitches in knit element 131. As another example,yarn 139 may be formed from a yarn that is softer and more comfortableagainst the foot than yarn 138, with yarn 138 being primarily present onfirst surface 136 and yarn 139 being primarily present on second surface137.

Continuing with the configuration of FIG. 8B, yarn 138 may be formedfrom at least one of a thermoset polymer material and natural fibers(e.g., cotton, wool, silk), whereas yarn 139 may be formed from athermoplastic polymer material. In general, a thermoplastic polymermaterial melts when heated and returns to a solid state when cooled.More particularly, the thermoplastic polymer material transitions from asolid state to a softened or liquid state when subjected to sufficientheat, and then the thermoplastic polymer material transitions from thesoftened or liquid state to the solid state when sufficiently cooled. Assuch, thermoplastic polymer materials are often used to join two objectsor elements together. In this case, yarn 139 may be utilized to join (a)one portion of yarn 138 to another portion of yarn 138, (b) yarn 138 andinlaid strand 132 to each other, or (c) another element (e.g., logos,trademarks, and placards with care instructions and materialinformation) to knitted component 130, for example. As such, yarn 139may be considered a fusible yarn given that it may be used to fuse orotherwise join portions of knitted component 130 to each other.Moreover, yarn 138 may be considered a non-fusible yarn given that it isnot formed from materials that are generally capable of fusing orotherwise joining portions of knitted component 130 to each other. Thatis, yarn 138 may be a non-fusible yarn, whereas yarn 139 may be afusible yarn. In some configurations of knitted component 130, yarn 138(i.e., the non-fusible yarn) may be substantially formed from athermoset polyester material and yarn 139 (i.e., the fusible yarn) maybe at least partially formed from a thermoplastic polyester material.

The use of plated yarns may impart advantages to knitted component 130.When yarn 139 is heated and fused to yarn 138 and inlaid strand 132,this process may have the effect of stiffening or rigidifying thestructure of knitted component 130. Moreover, joining (a) one portion ofyarn 138 to another portion of yarn 138 or (b) yarn 138 and inlaidstrand 132 to each other has the effect of securing or locking therelative positions of yarn 138 and inlaid strand 132, thereby impartingstretch-resistance and stiffness. That is, portions of yarn 138 may notslide relative to each other when fused with yarn 139, therebypreventing warping or permanent stretching of knit element 131 due torelative movement of the knit structure. Another benefit relates tolimiting unraveling if a portion of knitted component 130 becomesdamaged or one of yarns 138 is severed. Also, inlaid strand 132 may notslide relative to knit element 131, thereby preventing portions ofinlaid strand 132 from pulling outward from knit element 131.Accordingly, areas of knitted component 130 may benefit from the use ofboth fusible and non-fusible yarns within knit element 131.

Another aspect of knitted component 130 relates to a padded areaadjacent to ankle opening 121 and extending at least partially aroundankle opening 121. Referring to FIG. 7E, the padded area is formed bytwo overlapping and at least partially coextensive knitted layers 140,which may be formed of unitary knit construction, and a plurality offloating yarns 141 extending between knitted layers 140. Although thesides or edges of knitted layers 140 are secured to each other, acentral area is generally unsecured. As such, knitted layers 140effectively form a tube or tubular structure, and floating yarns 141 maybe located or inlaid between knitted layers 140 to pass through thetubular structure. That is, floating yarns 141 extend between knittedlayers 140, are generally parallel to surfaces of knitted layers 140,and also pass through and fill an interior volume between knitted layers140. Whereas a majority of knit element 131 is formed from yarns thatare mechanically-manipulated to form intermeshed loops, floating yarns141 are generally free or otherwise inlaid within the interior volumebetween knitted layers 140. As an additional matter, knitted layers 140may be at least partially formed from a stretch yarn. An advantage ofthis configuration is that knitted layers will effectively compressfloating yarns 141 and provide an elastic aspect to the padded areaadjacent to ankle opening 121. That is, the stretch yarn within knittedlayers 140 may be placed in tension during the knitting process thatforms knitted component 130, thereby inducing knitted layers 140 tocompress floating yarns 141. Although the degree of stretch in thestretch yarn may vary significantly, the stretch yarn may stretch atleast one-hundred percent in many configurations of knitted component130.

The presence of floating yarns 141 imparts a compressible aspect to thepadded area adjacent to ankle opening 121, thereby enhancing the comfortof footwear 100 in the area of ankle opening 121. Many conventionalarticles of footwear incorporate polymer foam elements or othercompressible materials into areas adjacent to an ankle opening. Incontrast with the conventional articles of footwear, portions of knittedcomponent 130 formed of unitary knit construction with a remainder ofknitted component 130 may form the padded area adjacent to ankle opening121. In further configurations of footwear 100, similar padded areas maybe located in other areas of knitted component 130. For example, similarpadded areas may be located as an area corresponding with joints betweenthe metatarsals and proximal phalanges to impart padding to the joints.As an alternative, a terry loop structure may also be utilized to impartsome degree of padding to areas of upper 120.

Based upon the above discussion, knit component 130 imparts a variety offeatures to upper 120. Moreover, knit component 130 provides a varietyof advantages over some conventional upper configurations. As notedabove, conventional footwear uppers are formed from multiple materialelements (e.g., textiles, polymer foam, polymer sheets, leather,synthetic leather) that are joined through stitching or bonding, forexample. As the number and type of material elements incorporated intoan upper increases, the time and expense associated with transporting,stocking, cutting, and joining the material elements may also increase.Waste material from cutting and stitching processes also accumulates toa greater degree as the number and type of material elementsincorporated into the upper increases. Moreover, uppers with a greaternumber of material elements may be more difficult to recycle than uppersformed from fewer types and numbers of material elements. By decreasingthe number of material elements utilized in the upper, therefore, wastemay be decreased while increasing the manufacturing efficiency andrecyclability of the upper. To this end, knitted component 130 forms asubstantial portion of upper 120, while increasing manufacturingefficiency, decreasing waste, and simplifying recyclability.

Further Knitted Component Configurations

A knitted component 150 is depicted in FIGS. 9 and 10 and may beutilized in place of knitted component 130 in footwear 100. The primaryelements of knitted component 150 are a knit element 151 and an inlaidstrand 152. Knit element 151 is formed from at least one yarn that ismanipulated (e.g., with a knitting machine) to form a plurality ofintermeshed loops that define a variety of courses and wales. That is,knit element 151 has the structure of a knit textile. Inlaid strand 152extends through knit element 151 and passes between the various loopswithin knit element 151. Although inlaid strand 152 generally extendsalong courses within knit element 151, inlaid strand 152 may also extendalong wales within knit element 151. As with inlaid strand 132, inlaidstrand 152 imparts stretch-resistance and, when incorporated intofootwear 100, operates in connection with lace 122 to enhance the fit offootwear 100.

Knit element 151 has a generally U-shaped configuration that is outlinedby a perimeter edge 153, a pair of heel edges 154, and an inner edge155. In addition, knit element 151 has a first surface 156 and anopposite second surface 157. First surface 156 may form a portion of theexterior surface of upper 120, whereas second surface 157 may form aportion of the interior surface of upper 120, thereby defining at leasta portion of the void within upper 120. In many configurations, knitelement 151 may have the configuration of a single textile layer in thearea of inlaid strand 152. That is, knit element 151 may be a singletextile layer between surfaces 156 and 157. In addition, knit element151 defines a plurality of lace apertures 158.

Similar to inlaid strand 132, inlaid strand 152 repeatedly extends fromperimeter edge 153 toward inner edge 155, at least partially around oneof lace apertures 158, and back to perimeter edge 153. In contrast withinlaid strand 132, however, some portions of inlaid strand 152 anglerearwards and extend to heel edges 154. More particularly, the portionsof inlaid strand 152 associated with the most rearward lace apertures158 extend from one of heel edges 154 toward inner edge 155, at leastpartially around one of the most rearward lace apertures 158, and backto one of heel edges 154. Additionally, some portions of inlaid strand152 do not extend around one of lace apertures 158. More particularly,some sections of inlaid strand 152 extend toward inner edge 155, turn inareas adjacent to one of lace apertures 158, and extend back towardperimeter edge 153 or one of heel edges 154.

Although knit element 151 may be formed in a variety of ways, courses ofthe knit structure generally extend in the same direction as inlaidstrands 152. In areas adjacent to lace apertures 158, however, inlaidstrand 152 may also extend along wales within knit element 151. Moreparticularly, sections of inlaid strand 152 that are parallel to inneredge 155 may extend along wales.

In comparison with knit element 151, inlaid strand 152 may exhibitgreater stretch-resistance. That is, inlaid strand 152 may stretch lessthan knit element 151. Given that numerous sections of inlaid strand 152extend through knit element 151, inlaid strand 152 may impartstretch-resistance to portions of upper 120 between the throat area andthe lower area. Moreover, placing tension upon lace 122 may imparttension to inlaid strand 152, thereby inducing the portions of upper 120between the throat area and the lower area to lay against the foot.Additionally, given that numerous sections of inlaid strand 152 extendtoward heel edges 154, inlaid strand 152 may impart stretch-resistanceto portions of upper 120 in heel region 103. Moreover, placing tensionupon lace 122 may induce the portions of upper 120 in heel region 103 tolay against the foot. As such, inlaid strand 152 operates in connectionwith lace 122 to enhance the fit of footwear 100.

Knit element 151 may incorporate any of the various types of yarndiscussed above for knit element 131. Inlaid strand 152 may also beformed from any of the configurations and materials discussed above forinlaid strand 132. Additionally, the various knit configurationsdiscussed relative to FIGS. 8A and 8B may also be utilized in knittedcomponent 150. More particularly, knit element 151 may have areas formedfrom a single yarn, two plated yarns, or a fusible yarn and anon-fusible yarn, with the fusible yarn joining (a) one portion of thenon-fusible yarn to another portion of the non-fusible yarn or (b) thenon-fusible yarn and inlaid strand 152 to each other.

A majority of knit element 131 is depicted as being formed from arelatively untextured textile and a common or single knit structure(e.g., a tubular knit structure). In contrast, knit element 151incorporates various knit structures that impart specific properties andadvantages to different areas of knitted component 150. Moreover, bycombining various yarn types with the knit structures, knitted component150 may impart a range of properties to different areas of upper 120.Referring to FIG. 11, a schematic view of knitted component 150 showsvarious zones 160-169 having different knit structures, each of whichwill now be discussed in detail. For purposes of reference, each ofregions 101-103 and sides 104 and 105 are shown in FIG. 11 to provide areference for the locations of knit zones 160-169 when knitted component150 is incorporated into footwear 100.

A tubular knit zone 160 extends along a majority of perimeter edge 153and through each of regions 101-103 on both of sides 104 and 105.Tubular knit zone 160 also extends inward from each of sides 104 and 105in an area approximately located at an interface regions 101 and 102 toform a forward portion of inner edge 155. Tubular knit zone 160 forms arelatively untextured knit configuration. Referring to FIG. 12A, across-section through an area of tubular knit zone 160 is depicted, andsurfaces 156 and 157 are substantially parallel to each other. Tubularknit zone 160 imparts various advantages to footwear 100. For example,tubular knit zone 160 has greater durability and wear resistance thansome other knit structures, especially when the yarn in tubular knitzone 160 is plated with a fusible yarn. In addition, the relativelyuntextured aspect of tubular knit zone 160 simplifies the process ofjoining strobel sock 125 to perimeter edge 153. That is, the portion oftubular knit zone 160 located along perimeter edge 153 facilitates thelasting process of footwear 100. For purposes of reference, FIG. 13Adepicts a loop diagram of the manner in which tubular knit zone 160 isformed with a knitting process.

Two stretch knit zones 161 extend inward from perimeter edge 153 and arelocated to correspond with a location of joints between metatarsals andproximal phalanges of the foot. That is, stretch zones extend inwardfrom perimeter edge in the area approximately located at the interfaceregions 101 and 102. As with tubular knit zone 160, the knitconfiguration in stretch knit zones 161 may be a tubular knit structure.In contrast with tubular knit zone 160, however, stretch knit zones 161are formed from a stretch yarn that imparts stretch and recoveryproperties to knitted component 150. Although the degree of stretch inthe stretch yarn may vary significantly, the stretch yarn may stretch atleast one-hundred percent in many configurations of knitted component150.

A tubular and interlock tuck knit zone 162 extends along a portion ofinner edge 155 in at least midfoot region 102. Tubular and interlocktuck knit zone 162 also forms a relatively untextured knitconfiguration, but has greater thickness than tubular knit zone 160. Incross-section, tubular and interlock tuck knit zone 162 is similar toFIG. 12A, in which surfaces 156 and 157 are substantially parallel toeach other. Tubular and interlock tuck knit zone 162 imparts variousadvantages to footwear 100. For example, tubular and interlock tuck knitzone 162 has greater stretch resistance than some other knit structures,which is beneficial when lace 122 places tubular and interlock tuck knitzone 162 and inlaid strands 152 in tension. For purposes of reference,FIG. 13B depicts a loop diagram of the manner in which tubular andinterlock tuck knit zone 162 is formed with a knitting process.

A 1×1 mesh knit zone 163 is located in forefoot region 101 and spacedinward from perimeter edge 153. 1×1 mesh knit zone has a C-shapedconfiguration and forms a plurality of apertures that extend throughknit element 151 and from first surface 156 to second surface 157, asdepicted in FIG. 12B. The apertures enhance the permeability of knittedcomponent 150, which allows air to enter upper 120 and moisture toescape from upper 120. For purposes of reference, FIG. 13C depicts aloop diagram of the manner in which 1×1 mesh knit zone 163 is formedwith a knitting process.

A 2×2 mesh knit zone 164 extends adjacent to 1×1 mesh knit zone 163. Incomparison with 1×1 mesh knit zone 163, 2×2 mesh knit zone 164 formslarger apertures, which may further enhance the permeability of knittedcomponent 150. For purposes of reference, FIG. 13D depicts a loopdiagram of the manner in which 2×2 mesh knit zone 164 is formed with aknitting process.

A 3×2 mesh knit zone 165 is located within 2×2 mesh knit zone 164, andanother 3×2 mesh knit zone 165 is located adjacent to one of stretchzones 161. In comparison with 1×1 mesh knit zone 163 and 2×2 mesh knitzone 164, 3×2 mesh knit zone 165 forms even larger apertures, which mayfurther enhance the permeability of knitted component 150. For purposesof reference, FIG. 13E depicts a loop diagram of the manner in which 3×2mesh knit zone 165 is formed with a knitting process.

A 1×1 mock mesh knit zone 166 is located in forefoot region 101 andextends around 1×1 mesh knit zone 163. In contrast with mesh knit zones163-165, which form apertures through knit element 151, 1×1 mock meshknit zone 166 forms indentations in first surface 156, as depicted inFIG. 12C. In addition to enhancing the aesthetics of footwear 100, 1×1mock mesh knit zone 166 may enhance flexibility and decrease the overallmass of knitted component 150. For purposes of reference, FIG. 13Fdepicts a loop diagram of the manner in which 1×1 mock mesh knit zone166 is formed with a knitting process.

Two 2×2 mock mesh knit zones 167 are located in heel region 103 andadjacent to heel edges 154. In comparison with 1×1 mock mesh knit zone166, 2×2 mock mesh knit zones 167 forms larger indentations in firstsurface 156. In areas where inlaid strands 152 extend throughindentations in 2×2 mock mesh knit zones 167, as depicted in FIG. 12D,inlaid strands 152 may be visible and exposed in a lower area of theindentations. For purposes of reference, FIG. 13G depicts a loop diagramof the manner in which 2×2 mock mesh knit zones 167 are formed with aknitting process.

Two 2×2 hybrid knit zones 168 are located in midfoot region 102 andforward of 2×2 mock mesh knit zones 167. 2×2 hybrid knit zones 168 sharecharacteristics of 2×2 mesh knit zone 164 and 2×2 mock mesh knit zones167. More particularly, 2×2 hybrid knit zones 168 form apertures havingthe size and configuration of 2×2 mesh knit zone 164, and 2×2 hybridknit zones 168 form indentations having the size and configuration of2×2 mock mesh knit zones 167. In areas where inlaid strands 152 extendthrough indentations in 2×2 hybrid knit zones 168, as depicted in FIG.12E, inlaid strands 152 are visible and exposed. For purposes ofreference, FIG. 13H depicts a loop diagram of the manner in which 2×2hybrid knit zones 168 are formed with a knitting process.

Knitted component 150 also includes two padded zones 169 having thegeneral configuration of the padded area adjacent to ankle opening 121and extending at least partially around ankle opening 121, which wasdiscussed above for knitted component 130. As such, padded zones 169 areformed by two overlapping and at least partially coextensive knittedlayers, which may be formed of unitary knit construction, and aplurality of floating yarns extending between the knitted layers.

A comparison between FIGS. 9 and 10 reveals that a majority of thetexturing in knit element 151 is located on first surface 156, ratherthan second surface 157. That is, the indentations formed by mock meshknit zones 166 and 167, as well as the indentations in 2×2 hybrid knitzones 168, are formed in first surface 156. This configuration has anadvantage of enhancing the comfort of footwear 100. More particularly,this configuration places the relatively untextured configuration ofsecond surface 157 against the foot. A further comparison between FIGS.9 and 10 reveals that portions of inlaid strand 152 are exposed on firstsurface 156, but not on second surface 157. This configuration also hasan advantage of enhancing the comfort of footwear 100. Moreparticularly, by spacing inlaid strand 152 from the foot by a portion ofknit element 151, inlaid strands 152 will not contact the foot.

Additional configurations of knitted component 130 are depicted in FIGS.14A-14C. Although discussed in relation to kitted component 130,concepts associated with each of these configurations may also beutilized with knitted component 150. Referring to FIG. 14A, inlaidstrands 132 are absent from knitted component 130. Although inlaidstrands 132 impart stretch-resistance to areas of knitted component 130,some configurations may not require the stretch-resistance from inlaidstrands 132. Moreover, some configurations may benefit from greaterstretch in upper 120. Referring to FIG. 14B, knit element 131 includestwo flaps 142 that are formed of unitary knit construction with aremainder of knit element 131 and extend along the length of knittedcomponent 130 at perimeter edge 133. When incorporated into footwear100, flaps 142 may replace strobel sock 125. That is, flaps 142 maycooperatively form a portion of upper 120 that extends under sockliner113 and is secured to the upper surface of midsole 111. Referring toFIG. 14C, knitted component 130 has a configuration that is limited tomidfoot region 102. In this configuration, other material elements(e.g., textiles, polymer foam, polymer sheets, leather, syntheticleather) may be joined to knitted component 130 through stitching orbonding, for example, to form upper 120.

Based upon the above discussion, each of knit components 130 and 150 mayhave various configurations that impart features and advantages to upper120. More particularly, knit elements 131 and 151 may incorporatevarious knit structures and yarn types that impart specific propertiesto different areas of upper 120, and inlaid strands 132 and 152 mayextend through the knit structures to impart stretch-resistance to areasof upper 120 and operate in connection with lace 122 to enhance the fitof footwear 100.

Knitting Machine And Feeder Configurations

Although knitting may be performed by hand, the commercial manufactureof knitted components is generally performed by knitting machines. Anexample of a knitting machine 200 that is suitable for producing eitherof knitted components 130 and 150 is depicted in FIG. 15. Knittingmachine 200 has a configuration of a V-bed flat knitting machine forpurposes of example, but either of knitted components 130 and 150 oraspects of knitted components 130 and 150 may be produced on other typesof knitting machines.

Knitting machine 200 includes two needle beds 201 that are angled withrespect to each other, thereby forming a V-bed. Each of needle beds 201include a plurality of individual needles 202 that lay on a commonplane. That is, needles 202 from one needle bed 201 lay on a firstplane, and needles 202 from the other needle bed 201 lay on a secondplane. The first plane and the second plane (i.e., the two needle beds201) are angled relative to each other and meet to form an intersectionthat extends along a majority of a width of knitting machine 200. Asdescribed in greater detail below, needles 202 each have a firstposition where they are retracted and a second position where they areextended. In the first position, needles 202 are spaced from theintersection where the first plane and the second plane meet. In thesecond position, however, needles 202 pass through the intersectionwhere the first plane and the second plane meet.

A pair of rails 203 extend above and parallel to the intersection ofneedle beds 201 and provide attachment points for multiple standardfeeders 204 and combination feeders 220. Each rail 203 has two sides,each of which accommodates either one standard feeder 204 or onecombination feeder 220. As such, knitting machine 200 may include atotal of four feeders 204 and 220. As depicted, the forward-most rail203 includes one combination feeder 220 and one standard feeder 204 onopposite sides, and the rearward-most rail 203 includes two standardfeeders 204 on opposite sides. Although two rails 203 are depicted,further configurations of knitting machine 200 may incorporateadditional rails 203 to provide attachment points for more feeders 204and 220.

Due to the action of a carriage 205, feeders 204 and 220 move alongrails 203 and needle beds 201, thereby supplying yarns to needles 202.In FIG. 15, a yarn 206 is provided to combination feeder 220 by a spool207. More particularly, yarn 206 extends from spool 207 to various yarnguides 208, a yarn take-back spring 209, and a yarn tensioner 210 beforeentering combination feeder 220. Although not depicted, additionalspools 207 may be utilized to provide yarns to feeders 204.

Standard feeders 204 are conventionally-utilized for a V-bed flatknitting machine, such as knitting machine 200. That is, existingknitting machines incorporate standard feeders 204. Each standard feeder204 has the ability to supply a yarn that needles 202 manipulate toknit, tuck, and float. As a comparison, combination feeder 220 has theability to supply a yarn (e.g., yarn 206) that needles 202 knit, tuck,and float, and combination feeder 220 has the ability to inlay the yarn.Moreover, combination feeder 220 has the ability to inlay a variety ofdifferent strands (e.g., filament, thread, rope, webbing, cable, chain,or yarn). Accordingly, combination feeder 220 exhibits greaterversatility than each standard feeder 204.

As noted above, combination feeder 220 may be utilized when inlaying ayarn or other strand, in addition to knitting, tucking, and floating theyarn. Conventional knitting machines, which do not incorporatecombination feeder 220, may also inlay a yarn. More particularly,conventional knitting machines that are supplied with an inlay feedermay also inlay a yarn. A conventional inlay feeder for a V-bed flatknitting machine includes two components that operate in conjunction toinlay the yarn. Each of the components of the inlay feeder are securedto separate attachment points on two adjacent rails, thereby occupyingtwo attachment points. Whereas an individual standard feeder 204 onlyoccupies one attachment point, two attachment points are generallyoccupied when an inlay feeder is utilized to inlay a yarn into a knittedcomponent. Moreover, whereas combination feeder 220 only occupies oneattachment point, a conventional inlay feeder occupies two attachmentpoints.

Given that knitting machine 200 includes two rails 203, four attachmentpoints are available in knitting machine 200. If a conventional inlayfeeder were utilized with knitting machine 200, only two attachmentpoints would be available for standard feeders 204. When usingcombination feeder 220 in knitting machine 200, however, threeattachment points are available for standard feeders 204. Accordingly,combination feeder 220 may be utilized when inlaying a yarn or otherstrand, and combination feeder 220 has an advantage of only occupyingone attachment point.

Combination feeder 220 is depicted individually in FIGS. 16-19 asincluding a carrier 230, a feeder arm 240, and a pair of actuationmembers 250. Although a majority of combination feeder 220 may be formedfrom metal materials (e.g., steel, aluminum, titanium), portions ofcarrier 230, feeder arm 240, and actuation members 250 may be formedfrom polymer, ceramic, or composite materials, for example. As discussedabove, combination feeder 220 may be utilized when inlaying a yarn orother strand, in addition to knitting, tucking, and floating a yarn.Referring to FIG. 16 specifically, a portion of yarn 206 is depicted toillustrate the manner in which a strand interfaces with combinationfeeder 220.

Carrier 230 has a generally rectangular configuration and includes afirst cover member 231 and a second cover member 232 that are joined byfour bolts 233. Cover members 231 and 232 define an interior cavity inwhich portions of feeder arm 240 and actuation members 250 are located.Carrier 230 also includes an attachment element 234 that extends outwardfrom first cover member 231 for securing feeder 220 to one of rails 203.Although the configuration of attachment element 234 may vary,attachment element 234 is depicted as including two spaced protrudingareas that form a dovetail shape, as depicted in FIG. 17. A reversedovetail configuration on one of rails 203 may extend into the dovetailshape of attachment element 234 to effectively join combination feeder220 to knitting machine 200. It should also be noted that second covermember 234 forms a centrally-located and elongate slot 235, as depictedin FIG. 18.

Feeder arm 240 has a generally elongate configuration that extendsthrough carrier 230 (i.e., the cavity between cover members 231 and 232)and outward from a lower side of carrier 230. In addition to otherelements, feeder arm 240 includes an actuation bolt 241, a spring 242, apulley 243, a loop 244, and a dispensing area 245. Actuation bolt 241extends outward from feeder arm 240 and is located within the cavitybetween cover members 231 and 232. One side of actuation bolt 241 isalso located within slot 235 in second cover member 232, as depicted inFIG. 18. Spring 242 is secured to carrier 230 and feeder arm 240. Moreparticularly, one end of spring 242 is secured to carrier 230, and anopposite end of spring 242 is secured to feeder arm 240. Pulley 243,loop 244, and dispensing area 245 are present on feeder arm 240 tointerface with yarn 206 or another strand. Moreover, pulley 243, loop244, and dispensing area 245 are configured to ensure that yarn 206 oranother strand smoothly passes through combination feeder 220, therebybeing reliably-supplied to needles 202. Referring again to FIG. 16, yarn206 extends around pulley 243, through loop 244, and into dispensingarea 245. In addition, yarn 206 extends out of a dispensing tip 246,which is an end region of feeder arm 240, to then supply needles 202.

Each of actuation members 250 includes an arm 251 and a plate 252. Inmany configurations of actuation members 250, each arm 251 is formed asa one-piece element with one of plates 252. Whereas arms 251 are locatedoutside of carrier 230 and at an upper side of carrier 230, plates 252are located within carrier 250. Each of arms 251 has an elongateconfiguration that defines an outside end 253 and an opposite inside end254, and arms 251 are positioned to define a space 255 between both ofinside ends 254. That is, arms 251 are spaced from each other. Plates252 have a generally planar configuration. Referring to FIG. 19, each ofplates 252 define an aperture 256 with an inclined edge 257. Moreover,actuation bolt 241 of feeder arm 240 extends into each aperture 256.

The configuration of combination feeder 220 discussed above provides astructure that facilitates a translating movement of feeder arm 240. Asdiscussed in greater detail below, the translating movement of feederarm 240 selectively positions dispensing tip 246 at a location that isabove or below the intersection of needle beds 201. That is, dispensingtip 246 has the ability to reciprocate through the intersection ofneedle beds 201. An advantage to the translating movement of feeder arm240 is that combination feeder 220 (a) supplies yarn 206 for knitting,tucking, and floating when dispensing tip 246 is positioned above theintersection of needle beds 201 and (b) supplies yarn 206 or anotherstrand for inlaying when dispensing tip 246 is positioned below theintersection of needle beds 201. Moreover, feeder arm 240 reciprocatesbetween the two positions depending upon the manner in which combinationfeeder 220 is being utilized.

In reciprocating through the intersection of needle beds 201, feeder arm240 translates from a retracted position to an extended position. Whenin the retracted position, dispensing tip 246 is positioned above theintersection of needle beds 201. When in the extended position,dispensing tip 246 is positioned below the intersection of needle beds201. Dispensing tip 246 is closer to carrier 230 when feeder arm 240 isin the retracted position than when feeder arm 240 is in the extendedposition. Similarly, dispensing tip 246 is further from carrier 230 whenfeeder arm 240 is in the extended position than when feeder arm 240 isin the retracted position. In other words, dispensing tip 246 moves awayfrom carrier 230 when in the extended position, and dispensing tip 246moves closer to carrier 230 when in the retracted position.

For purposes of reference in FIGS. 16-20C, as well as further figuresdiscussed later, an arrow 221 is positioned adjacent to dispensing area245. When arrow 221 points upward or toward carrier 230, feeder arm 240is in the retracted position. When arrow 221 points downward or awayfrom carrier 230, feeder arm 240 is in the extended position.Accordingly, by referencing the position of arrow 221, the position offeeder arm 240 may be readily ascertained.

The natural state of feeder arm 240 is the retracted position. That is,when no significant forces are applied to areas of combination feeder220, feeder arm remains in the retracted position. Referring to FIGS.16-19, for example, no forces or other influences are shown asinteracting with combination feeder 220, and feeder arm 240 is in theretracted position. The translating movement of feeder arm 240 mayoccur, however, when a sufficient force is applied to one of arms 251.More particularly, the translating movement of feeder arm 240 occurswhen a sufficient force is applied to one of outside ends 253 and isdirected toward space 255. Referring to FIGS. 20A and 20B, a force 222is acting upon one of outside ends 253 and is directed toward space 255,and feeder arm 240 is shown as having translated to the extendedposition. Upon removal of force 222, however, feeder arm 240 will returnto the retracted position. It should also be noted that FIG. 20C depictsforce 222 as acting upon inside ends 254 and being directed outward, andfeeder arm 240 remains in the retracted position.

As discussed above, feeders 204 and 220 move along rails 203 and needlebeds 201 due to the action of carriage 205. More particularly, a drivebolt within carriage 205 contacts feeders 204 and 220 to push feeders204 and 220 along needle beds 201. With respect to combination feeder220, the drive bolt may either contact one of outside ends 253 or one ofinside ends 254 to push combination feeder 220 along needle beds 201.When the drive bolt contacts one of outside ends 253, feeder arm 240translates to the extended position and dispensing tip 246 passes belowthe intersection of needle beds 201. When the drive bolt contacts one ofinside ends 254 and is located within space 255, feeder arm 240 remainsin the retracted position and dispensing tip 246 is above theintersection of needle beds 201. Accordingly, the area where carriage205 contacts combination feeder 220 determines whether feeder arm 240 isin the retracted position or the extended position.

The mechanical action of combination feeder 220 will now be discussed.FIGS. 19-20B depict combination feeder 220 with first cover member 231removed, thereby exposing the elements within the cavity in carrier 230.By comparing FIG. 19 with FIGS. 20A and 20B, the manner in which force222 induces feeder arm 240 to translate may be apparent. When force 222acts upon one of outside ends 253, one of actuation members 250 slidesin a direction that is perpendicular to the length of feeder arm 240.That is, one of actuation members 250 slides horizontally in FIGS.19-20B. The movement of one of actuation members 250 causes actuationbolt 241 to engage one of inclined edges 257. Given that the movement ofactuation members 250 is constrained to the direction that isperpendicular to the length of feeder arm 240, actuation bolt 241 rollsor slides against inclined edge 257 and induces feeder arm 240 totranslate to the extended position. Upon removal of force 222, spring242 pulls feeder arm 240 from the extended position to the retractedposition.

Based upon the above discussion, combination feeder 220 reciprocatesbetween the retracted position and the extended position depending uponwhether a yarn or other strand is being utilized for knitting, tucking,or floating or being utilized for inlaying. Combination feeder 220 has aconfiguration wherein the application of force 222 induces feeder arm240 to translate from the retracted position to the extended position,and removal of force 222 induces feeder arm 240 to translate from theextended position to the retracted position. That is, combination feeder220 has a configuration wherein the application and removal of force 222causes feeder arm 240 to reciprocate between opposite sides of needlebeds 201. In general, outside ends 253 may be considered actuationareas, which induce movement in feeder arm 240. In furtherconfigurations of combination feeder 220, the actuation areas may be inother locations or may respond to other stimuli to induce movement infeeder arm 240. For example, the actuation areas may be electricalinputs coupled to servomechanisms that control movement of feeder arm240. Accordingly, combination feeder 220 may have a variety ofstructures that operate in the same general manner as the configurationdiscussed above.

Knitting Process

The manner in which knitting machine 200 operates to manufacture aknitted component will now be discussed in detail. Moreover, thefollowing discussion will demonstrate the operation of combinationfeeder 220 during a knitting process. Referring to FIG. 21A, a portionof knitting machine 200 that includes various needles 202, rail 203,standard feeder 204, and combination feeder 220 is depicted. Whereascombination feeder 220 is secured to a front side of rail 203, standardfeeder 204 is secured to a rear side of rail 203. Yarn 206 passesthrough combination feeder 220, and an end of yarn 206 extends outwardfrom dispensing tip 246. Although yarn 206 is depicted, any other strand(e.g., filament, thread, rope, webbing, cable, chain, or yarn) may passthrough combination feeder 220. Another yarn 211 passes through standardfeeder 204 and forms a portion of a knitted component 260, and loops ofyarn 211 forming an uppermost course in knitted component 260 are heldby hooks located on ends of needles 202.

The knitting process discussed herein relates to the formation ofknitted component 260, which may be any knitted component, includingknitted components that are similar to knitted components 130 and 150.For purposes of the discussion, only a relatively small section ofknitted component 260 is shown in the figures in order to permit theknit structure to be illustrated. Moreover, the scale or proportions ofthe various elements of knitting machine 200 and knitted component 260may be enhanced to better illustrate the knitting process.

Standard feeder 204 includes a feeder arm 212 with a dispensing tip 213.Feeder arm 212 is angled to position dispensing tip 213 in a locationthat is (a) centered between needles 202 and (b) above an intersectionof needle beds 201. FIG. 22A depicts a schematic cross-sectional view ofthis configuration. Note that needles 202 lay on different planes, whichare angled relative to each other. That is, needles 202 from needle beds201 lay on the different planes. Needles 202 each have a first positionand a second position. In the first position, which is shown in solidline, needles 202 are retracted. In the second position, which is shownin dashed line, needles 202 are extended. In the first position, needles202 are spaced from the intersection where the planes upon which needlebeds 201 lay meet. In the second position, however, needles 202 areextended and pass through the intersection where the planes upon whichneedle beds 201 meet. That is, needles 202 cross each other whenextended to the second position. It should be noted that dispensing tip213 is located above the intersection of the planes. In this position,dispensing tip 213 supplies yarn 211 to needles 202 for purposes ofknitting, tucking, and floating.

Combination feeder 220 is in the retracted position, as evidenced by theorientation of arrow 221. Feeder arm 240 extends downward from carrier230 to position dispensing tip 246 in a location that is (a) centeredbetween needles 202 and (b) above the intersection of needle beds 201.FIG. 22B depicts a schematic cross-sectional view of this configuration.Note that dispensing tip 246 is positioned in the same relative locationas dispensing tip 213 in FIG. 22A.

Referring now to FIG. 21B, standard feeder 204 moves along rail 203 anda new course is formed in knitted component 260 from yarn 211. Moreparticularly, needles 202 pulled sections of yarn 211 through the loopsof the prior course, thereby forming the new course. Accordingly,courses may be added to knitted component 260 by moving standard feeder204 along needles 202, thereby permitting needles 202 to manipulate yarn211 and form additional loops from yarn 211.

Continuing with the knitting process, feeder arm 240 now translates fromthe retracted position to the extended position, as depicted in FIG.21C. In the extended position, feeder arm 240 extends downward fromcarrier 230 to position dispensing tip 246 in a location that is (a)centered between needles 202 and (b) below the intersection of needlebeds 201. FIG. 22C depicts a schematic cross-sectional view of thisconfiguration. Note that dispensing tip 246 is positioned below thelocation of dispensing tip 246 in FIG. 22B due to the translatingmovement of feeder arm 240.

Referring now to FIG. 21D, combination feeder 220 moves along rail 203and yarn 206 is placed between loops of knitted component 260. That is,yarn 206 is located in front of some loops and behind other loops in analternating pattern. Moreover, yarn 206 is placed in front of loopsbeing held by needles 202 from one needle bed 201, and yarn 206 isplaced behind loops being held by needles 202 from the other needle bed201. Note that feeder arm 240 remains in the extended position in orderto lay yarn 206 in the area below the intersection of needle beds 201.This effectively places yarn 206 within the course recently formed bystandard feeder 204 in FIG. 21B. In order to complete inlaying yarn 206into knitted component 260, standard feeder 204 moves along rail 203 toform a new course from yarn 211, as depicted in FIG. 21E. By forming thenew course, yarn 206 is effectively knit within or otherwise integratedinto the structure of knitted component 260. At this stage, feeder arm240 may also translate from the extended position to the retractedposition.

FIGS. 21D and 21E show separate movements of feeders 204 and 220 alongrail 203. That is, FIG. 21D shows a first movement of combination feeder220 along rail 203, and FIG. 21E shows a second and subsequent movementof standard feeder 204 along rail 203. In many knitting processes,feeders 204 and 220 may effectively move simultaneously to inlay yarn206 and form a new course from yarn 211. Combination feeder 220,however, moves ahead or in front of standard feeder 204 in order toposition yarn 206 prior to the formation of the new course from yarn211.

The general knitting process outlined in the above discussion providesan example of the manner in which inlaid strands 132 and 152 may belocated in knit elements 131 and 151. More particularly, knittedcomponents 130 and 150 may be formed by utilizing combination feeder 220to effectively insert inlaid strands 132 and 152 into knit elements 131.Given the reciprocating action of feeder arm 240, inlaid strands may belocated within a previously formed course prior to the formation of anew course.

Continuing with the knitting process, feeder arm 240 now translates fromthe retracted position to the extended position, as depicted in FIG.21F. Combination feeder 220 then moves along rail 203 and yarn 206 isplaced between loops of knitted component 260, as depicted in FIG. 21G.This effectively places yarn 206 within the course formed by standardfeeder 204 in FIG. 21E. In order to complete inlaying yarn 206 intoknitted component 260, standard feeder 204 moves along rail 203 to forma new course from yarn 211, as depicted in FIG. 21H. By forming the newcourse, yarn 206 is effectively knit within or otherwise integrated intothe structure of knitted component 260. At this stage, feeder arm 240may also translate from the extended position to the retracted position.

Referring to FIG. 21H, yarn 206 forms a loop 214 between the two inlaidsections. In the discussion of knitted component 130 above, it was notedthat inlaid strand 132 repeatedly exits knit element 131 at perimeteredge 133 and then re-enters knit element 131 at another location ofperimeter edge 133, thereby forming loops along perimeter edge 133, asseen in FIGS. 5 and 6. Loop 214 is formed in a similar manner. That is,loop 214 is formed where yarn 206 exits the knit structure of knittedcomponent 260 and then re-enters the knit structure.

As discussed above, standard feeder 204 has the ability to supply a yarn(e.g., yarn 211) that needles 202 manipulate to knit, tuck, and float.Combination feeder 220, however, has the ability to supply a yarn (e.g.,yarn 206) that needles 202 knit, tuck, or float, as well as inlaying theyarn. The above discussion of the knitting process describes the mannerin which combination feeder 220 inlays a yarn while in the extendedposition. Combination feeder 220 may also supply the yarn for knitting,tucking, and floating while in the retracted position. Referring to FIG.21I, for example, combination feeder 220 moves along rail 203 while inthe retracted position and forms a course of knitted component 260 whilein the retracted position. Accordingly, by reciprocating feeder arm 240between the retracted position and the extended position, combinationfeeder 220 may supply yarn 206 for purposes of knitting, tucking,floating, and inlaying. An advantage to combination feeder 220 relates,therefore, to its versatility in supplying a yarn that may be utilizedfor a greater number of functions than standard feeder 204

The ability of combination feeder 220 to supply yarn for knitting,tucking, floating, and inlaying is based upon the reciprocating actionof feeder arm 240. Referring to FIGS. 22A and 22B, dispensing tips 213and 246 are at identical positions relative to needles 220. As such,both feeders 204 and 220 may supply a yarn for knitting, tucking, andfloating. Referring to FIG. 22C, dispensing tip 246 is at a differentposition. As such, combination feeder 220 may supply a yarn or otherstrand for inlaying. An advantage to combination feeder 220 relates,therefore, to its versatility in supplying a yarn that may be utilizedfor knitting, tucking, floating, and inlaying.

Further Knitting Process Considerations

Additional aspects relating to the knitting process will now bediscussed. Referring to FIG. 23, the upper course of knitted component260 is formed from both of yarns 206 and 211. More particularly, a leftside of the course is formed from yarn 211, whereas a right side of thecourse is formed from yarn 206. Additionally, yarn 206 is inlaid intothe left side of the course. In order to form this configuration,standard feeder 204 may initially form the left side of the course fromyarn 211. Combination feeder 220 then lays yarn 206 into the right sideof the course while feeder arm 240 is in the extended position.Subsequently, feeder arm 240 moves from the extended position to theretracted position and forms the right side of the course. Accordingly,combination feeder may inlay a yarn into one portion of a course andthen supply the yarn for purposes of knitting a remainder of the course.

FIG. 24 depicts a configuration of knitting machine 200 that includesfour combination feeders 220. As discussed above, combination feeder 220has the ability to supply a yarn (e.g., yarn 206) for knitting, tucking,floating, and inlaying. Given this versatility, standard feeders 204 maybe replaced by multiple combination feeders 220 in knitting machine 200or in various conventional knitting machines.

FIG. 8B depicts a configuration of knitted component 130 where two yarns138 and 139 are plated to form knit element 131, and inlaid strand 132extends through knit element 131. The general knitting process discussedabove may also be utilized to form this configuration. As depicted inFIG. 15, knitting machine 200 includes multiple standard feeders 204,and two of standard feeders 204 may be utilized to form knit element131, with combination feeder 220 depositing inlaid strand 132.Accordingly, the knitting process discussed above in FIGS. 21A-21I maybe modified by adding another standard feeder 204 to supply anadditional yarn. In configurations where yarn 138 is a non-fusible yarnand yarn 139 is a fusible yarn, knitted component 130 may be heatedfollowing the knitting process to fuse knitted component 130. Theportion of knitted component 260 depicted in FIGS. 21A-21I has theconfiguration of a rib knit textile with regular and uninterruptedcourses and wales. That is, the portion of knitted component 260 doesnot have, for example, any mesh areas similar to mesh knit zones 163-165or mock mesh areas similar to mock mesh knit zones 166 and 167. In orderto form mesh knit zones 163-165 in either of knitted components 150 and260, a combination of a racked needle bed 201 and a transfer of stitchloops from front to back needle beds 201 and back to front needle beds201 in different racked positions is utilized. In order to form mockmesh areas similar to mock mesh knit zones 166 and 167, a combination ofa racked needle bed and a transfer of stitch loops from front to backneedle beds 201 is utilized.

Courses within a knitted component are generally parallel to each other.Given that a majority of inlaid strand 152 follows courses within knitelement 151, it may be suggested that the various sections of inlaidstrand 152 should be parallel to each other. Referring to FIG. 9, forexample, some sections of inlaid strand 152 extend between edges 153 and155 and other sections extend between edges 153 and 154. Varioussections of inlaid strand 152 are, therefore, not parallel. The conceptof forming darts may be utilized to impart this non-parallelconfiguration to inlaid strand 152. More particularly, courses ofvarying length may be formed to effectively insert wedge-shapedstructures between sections of inlaid strand 152. The structure formedin knitted component 150, therefore, where various sections of inlaidstrand 152 are not parallel, may be accomplished through the process ofdarting.

Although a majority of inlaid strands 152 follow courses within knitelement 151, some sections of inlaid strand 152 follow wales. Forexample, sections of inlaid strand 152 that are adjacent to and parallelto inner edge 155 follow wales. This may be accomplished by firstinserting a section of inlaid strand 152 along a portion of a course andto a point where inlaid strand 152 is intended to follow a wale. Inlaidstrand 152 is then kicked back to move inlaid strand 152 out of the way,and the course is finished. As the subsequent course is being formed,inlay strand 152 is again kicked back to move inlaid strand 152 out ofthe way at the point where inlaid strand 152 is intended to follow thewale, and the course is finished. This process is repeated until inlaidstrand 152 extends a desired distance along the wale. Similar conceptsmay be utilized for portions of inlaid strand 132 in knitted component130.

A variety of procedures may be utilized to reduce relative movementbetween (a) knit element 131 and inlaid strand 132 or (b) knit element151 and inlaid strand 152. That is, various procedures may be utilizedto prevent inlaid strands 132 and 152 from slipping, moving through,pulling out, or otherwise becoming displaced from knit elements 131 and151. For example, fusing one or more yarns that are formed fromthermoplastic polymer materials to inlaid strands 132 and 152 mayprevent movement between inlaid strands 132 and 152 and knit elements131 and 151. Additionally, inlaid strands 132 and 152 may be fixed toknit elements 131 and 151 when periodically fed to knitting needles as atuck element. That is, inlaid strands 132 and 152 may be formed intotuck stitches at points along their lengths (e.g., once per centimeter)in order to secure inlaid strands 132 and 152 to knit elements 131 and151 and prevent movement of inlaid strands 132 and 152.

Following the knitting process described above, various operations maybe performed to enhance the properties of either of knitted components130 and 150. For example, a water-repellant coating or otherwater-resisting treatment may be applied to limit the ability of theknit structures to absorb and retain water. As another example, knittedcomponents 130 and 150 may be steamed to improve loft and induce fusingof the yarns. As discussed above with respect to FIG. 8B, yarn 138 maybe a non-fusible yarn and yarn 139 may be a fusible yarn. When steamed,yarn 139 may melt or otherwise soften so as to transition from a solidstate to a softened or liquid state, and then transition from thesoftened or liquid state to the solid state when sufficiently cooled. Assuch, yarn 139 may be utilized to join (a) one portion of yarn 138 toanother portion of yarn 138, (b) yarn 138 and inlaid strand 132 to eachother, or (c) another element (e.g., logos, trademarks, and placardswith care instructions and material information) to knitted component130, for example. Accordingly, a steaming process may be utilized toinduce fusing of yarns in knitted components 130 and 150.

Although procedures associated with the steaming process may varygreatly, one method involves pinning one of knitted components 130 and150 to a jig during steaming. An advantage of pinning one of knittedcomponents 130 and 150 to a jig is that the resulting dimensions ofspecific areas of knitted components 130 and 150 may be controlled. Forexample, pins on the jig may be located to hold areas corresponding toperimeter edge 133 of knitted component 130. By retaining specificdimensions for perimeter edge 133, perimeter edge 133 will have thecorrect length for a portion of the lasting process that joins upper 120to sole structure 110. Accordingly, pinning areas of knitted components130 and 150 may be utilized to control the resulting dimensions ofknitted components 130 and 150 following the steaming process.

The knitting process described above for forming knitted component 260may be applied to the manufacture of knitted components 130 and 150 forfootwear 100. The knitting process may also be applied to themanufacture of a variety of other knitted components. That is, knittingprocesses utilizing one or more combination feeders or otherreciprocating feeders may be utilized to form a variety of knittedcomponents. As such, knitted components formed through the knittingprocess described above, or a similar process, may also be utilized inother types of apparel (e.g., shirts, pants, socks, jackets,undergarments), athletic equipment (e.g., golf bags, baseball andfootball gloves, soccer ball restriction structures), containers (e.g.,backpacks, bags), and upholstery for furniture (e.g., chairs, couches,car seats). The knitted components may also be utilized in bed coverings(e.g., sheets, blankets), table coverings, towels, flags, tents, sails,and parachutes. The knitted components may be utilized as technicaltextiles for industrial purposes, including structures for automotiveand aerospace applications, filter materials, medical textiles (e.g.bandages, swabs, implants), geotextiles for reinforcing embankments,agrotextiles for crop protection, and industrial apparel that protectsor insulates against heat and radiation. Accordingly, knitted componentsformed through the knitting process described above, or a similarprocess, may be incorporated into a variety of products for bothpersonal and industrial purposes.

The invention is disclosed above and in the accompanying figures withreference to a variety of configurations. The purpose served by thedisclosure, however, is to provide an example of the various featuresand concepts related to the invention, not to limit the scope of theinvention. One skilled in the relevant art will recognize that numerousvariations and modifications may be made to the configurations describedabove without departing from the scope of the present invention, asdefined by the appended claims.

1. An article of footwear having an upper and a sole structure secured to the upper, the upper including a knitted component comprising: a first yarn and a second yarn that are knitted together to form an area of the knitted component, the first yarn being at least partially formed from a thermoplastic polymer material, and the second yarn being entirely formed from at least one of a thermoset polymer material and natural fibers; and an inlaid strand extending through the area of the knitted component.
 2. The article of footwear recited in claim 1, wherein the first yarn is fused to the second yarn.
 3. The article of footwear recited in claim 1, wherein the first yarn is fused to the inlaid strand.
 4. The article of footwear recited in claim 1, wherein the inlaid strand extends from a throat area of the upper to a lower area of the upper.
 5. The article of footwear recited in claim 4, wherein the knitted component defines a plurality of apertures in the throat area for receiving a lace, and the inlaid strand extends around the apertures.
 6. The article of footwear recited in claim 1, further including a third yarn that is incorporated into another area of the knitted component, the third yarn stretching at least one-hundred percent.
 7. The article of footwear recited in claim 6, wherein the knitted component includes a pair of at least partially coextensive knitted layers formed of unitary knit construction, the third yarn being incorporated into at least one of the layers, and the knitted component includes a plurality of floating yarns located between the knitted layers and extending in a direction that is substantially parallel to the knitted layers.
 8. The article of footwear recited in claim 7, wherein the knitted layers and the floating yarns are located adjacent to an ankle opening of the upper.
 9. The article of footwear recited in claim 1, wherein the inlaid strand has a greater thickness than the first yarn and the second yarn.
 10. The article of footwear recited in claim 1, wherein the knitted component is formed of unitary knit construction and extends along a lateral side of the upper, along a medial side of the upper, over a forefoot region of the upper, and around a heel region of the upper.
 11. An article of footwear having an upper and a sole structure secured to the upper, the upper including a knitted component comprising: a fusible yarn and a non-fusible yarn that are knitted together to form a plurality of intermeshed loops defining courses and wales; and an inlaid strand extending along at least one of the courses.
 12. The article of footwear recited in claim 11, wherein the fusible yarn is fused to the non-fusible yarn.
 13. The article of footwear recited in claim 11, wherein the fusible yarn is fused to the inlaid strand.
 14. The article of footwear recited in claim 11, wherein the fusible yarn is at least partially formed from a thermoplastic polymer material, and the non-fusible yarn is substantially formed from at least one of a thermoset polymer material and natural fibers.
 15. The article of footwear recited in claim 11, wherein the fusible yarn is at least partially formed from a thermoplastic polyester, and the non-fusible yarn is substantially formed from thermoset polyester.
 16. An article of footwear having an upper and a sole structure secured to the upper, the upper comprising: a knit element defining a portion of an exterior surface of the upper and an opposite interior surface of the upper, the interior surface defining a void for receiving a foot, the knit element extending from a throat area of the upper to a lower area of the upper, and the knit element defining a plurality of apertures located within the throat area; an inlaid strand extending through the knit element from the throat area to the lower area, the inlaid strand extending at least partially around the apertures in the throat area, and the inlaid strand being located between the exterior surface and the interior surface in the throat area; and a lace extending through the apertures.
 17. The article of footwear recited in claim 16, wherein the inlaid strand repeatedly extends from the throat area to the lower area.
 18. The article of footwear recited in claim 16, wherein one section of the inlaid strand extends upward from the lower area to a first side of one of the apertures, the inlaid strand extends partially around the one of the apertures to an opposite second side of the one of the apertures, and the inlaid strand extends downward from the second side of the one of the apertures to the lower area.
 19. The article of footwear recited in claim 16, wherein a portion of the inlaid strand extends through the knit element from the throat area to a heel region of the footwear.
 20. The article of footwear recited in claim 19, wherein the portion of the inlaid strand extends to an edge in the heel region.
 21. The article of footwear recited in claim 16, wherein the knit element is formed of unitary knit construction and extends along a lateral side of the upper, along a medial side of the upper, over a forefoot region of the upper, and around a heel region of the upper.
 22. The article of footwear recited in claim 16, wherein the inlaid strand extends from the throat area to the lower area in the lateral side and the medial side.
 23. The article of footwear recited in claim 16, wherein a portion of the knit element forming the exterior surface exposes multiple sections of the inlaid strand between the throat area and the lower area.
 24. The article of footwear recited in claim 23, wherein a portion of the knit element forming the interior surface covers substantially all of the inlaid strand between the throat area and the lower area.
 25. An article of footwear having an upper and a sole structure secured to the upper, the upper comprising: a knit element forming a portion of an exterior surface of the upper and an opposite interior surface of the upper, the interior surface defining a void for receiving a foot, the knit element extending from a throat area of the upper to a lower area of the upper; and an inlaid strand extending through the knit element from the throat area to the lower area, wherein a portion of the knit element forming the exterior surface exposes multiple sections of the inlaid strand in an area between the throat area and the lower area, and a portion of the knit element forming the interior surface covers substantially all of the inlaid strand between the throat area and the lower area.
 26. The article of footwear recited in claim 25, wherein the knit element includes an aperture located within the throat area, and a lace extends through the aperture.
 27. The article of footwear recited in claim 26, wherein the inlaid strand extends at least partially around the apertures in the throat area, and the inlaid strand is located between the exterior surface and the interior surface in the throat area.
 28. The article of footwear recited in claim 26, wherein the inlaid strand extends from the lower area to a first side the aperture, the inlaid strand extends partially around the aperture to an opposite second side of the aperture, and the inlaid strand extends from the second side of the aperture to the lower area.
 29. The article of footwear recited in claim 25, wherein the knit element includes a yarn that is at least partially formed from a thermoplastic polymer material, the yarn being fused to the inlaid strand to join the yarn to the inlaid strand.
 30. An article of footwear having an upper and a sole structure secured to the upper, the upper comprising: a first knitted layer that forms at least a portion of an exterior surface of the upper; a second knitted layer formed of unitary knit construction with the first knitted layer, the second knitted layer being positioned adjacent to the first knitted layer and at least partially coextensive with the first knitted layer to define a tube between the first knitted layer and the second knitted layer; and a plurality of floating yarns located within the tube and extending in a direction that is substantially parallel to the first knitted layer and the second knitted layer, wherein the first knitted layer and the second knitted layer are at least partially formed from a yarn that stretches at least one hundred percent.
 31. The article of footwear recited in claim 30, wherein the upper defines an interior void for receiving a foot and an ankle opening providing access to the void, the first knitted layer, the second knitted layer, and the floating yarns being positioned adjacent to the ankle opening.
 32. The article of footwear recited in claim 30, wherein the first knitted layer, the second knitted layer, and the floating yarns are located on a medial side of the upper and a lateral side of the upper.
 33. The article of footwear recited in claim 30, wherein the first knitted layer, the second knitted layer are formed of unitary knit construction with a knitted component that extends along a lateral side of the upper, along a medial side of the upper, over a forefoot region of the upper, and around a heel region of the upper.
 34. The article of footwear recited in claim 30, wherein substantially all of the first knitted layer is formed from the yarn, and the second knitted layer is formed from the yarn and another yarn.
 35. An article of footwear having an upper and a sole structure secured to the upper, the upper comprising: a knit element including at least one yarn that forms a plurality of intermeshed loops, the knit element defining a portion of an exterior surface of the upper and an opposite interior surface of the upper, the interior surface defining a void for receiving a foot, the knit element having a configuration of a single textile layer that forms a portion of the exterior surface and the interior surface; and an inlaid strand extending through the knit element and located between the exterior surface and the interior surface.
 36. The article of footwear recited in claim 35, wherein the knitted structure includes a plurality of intermeshed loops that are formed from the yarn and define courses and wales, the inlaid strand extending along one of the courses.
 37. The article of footwear recited in claim 35, wherein the knit element extends from a throat area of the upper to a lower area of the upper, and the inlaid strand extends from the throat area to the lower area.
 38. The article of footwear recited in claim 37, wherein the knit element defines an aperture in the throat area, and the inlaid strand extends at least partially around the aperture.
 39. The article of footwear recited in claim 37, wherein a portion of the knit element forming the exterior surface exposes multiple sections of the inlaid strand between the throat area and the lower area.
 40. The article of footwear recited in claim 39, wherein a portion of the knit element forming the interior surface covers substantially all of the inlaid strand between the throat area and the lower area. 